Friday, February 24, 2012

I need help with SELECT statement

Hi, Could you help me modify the SELECT statement below that would
accomplish my final goal.
SELECT col1, col2 FROM table1 WHERE col3 < @.V
In col1 rows have many duplicates
col2 has unique values
col3 can have 5 possible values: 5, 10, 15, 20, 25
Variable @.V can be equal to 5 or 10 or 15 or 20 or 25
The goal is to:
Return row values from col1 without duplicates, and return corresponding
values from col2 (both col1 and col2 in one row) "WHERE" col3 always has
maximum value from all possible values but is <= @.V
Thank you.
Vanessa
It's not completely crystal clear what you need, but my guess is:
SELECT t1.col1, t1.col2
FROM table1 t1
INNER JOIN (SELECT col1, MAX(col3) AS col3
FROM table1
WHERE col3 <= @.v
GROUP BY col1) t2
ON t1.col1 = t2.col1 AND t1.col3 = t2.col3
Jacco Schalkwijk
SQL Server MVP
"Vanessa Lee" <van77788@.yahoo.com> wrote in message
news:Q7ydnWLCvMGoi8LfRVn-iQ@.comcast.com...
> Hi, Could you help me modify the SELECT statement below that would
> accomplish my final goal.
> SELECT col1, col2 FROM table1 WHERE col3 < @.V
> In col1 rows have many duplicates
> col2 has unique values
> col3 can have 5 possible values: 5, 10, 15, 20, 25
> Variable @.V can be equal to 5 or 10 or 15 or 20 or 25
> The goal is to:
> Return row values from col1 without duplicates, and return corresponding
> values from col2 (both col1 and col2 in one row) "WHERE" col3 always has
> maximum value from all possible values but is <= @.V
> Thank you.
> Vanessa
>

No comments:

Post a Comment